package collection;

import java.util.*;

public class SortInteger {
    public static void main(String[] args) {
        List<Integer> list = new ArrayList<>();
        Random rand= new Random();
        for(int i=0;i<10;i++){
            list.add(rand.nextInt(100));
        }
        System.out.println("list原始数据："+list);
        Collections.sort(list);//升序
        System.out.println("list排序后："+list);

        Collections.reverse(list);//反转
        System.out.println("list反转后："+list);
        System.out.println("第一个元素："+list.get(0));
    }
}
